Radical Addition/Cyclization Reaction of 2-Vinylanilines with Alkynes: Synthesis of Naphthalenes via Electron Catalysis
作者:Xia Cao、Bao-Gui Cai、Guo-Yong Xu、Jun Xuan
DOI:10.1002/asia.201801496
日期:2018.12.18
A cascaderadicaladdition/cyclization reaction of 2‐vinylanilines with alkynes for the synthesis of biologically important naphthalene derivatives is reported. In this transformation, the in‐situ‐formed diazonium salts from 2‐vinylanilines served as efficient aryl radical precursors and the reaction was run under metal‐free conditions.
Benzotriazole-Assisted Aromatic Ring Annulation: Efficient and General Syntheses of Polysubstituted Naphthalenes and Phenanthrenes
作者:Alan R. Katritzky、Guifen Zhang、Linghong Xie
DOI:10.1021/jo961597x
日期:1997.2.1
4-addition to alpha,beta-unsaturated aldehydes and ketones. Intramolecular cyclization of the products, induced by acetic acid-hydrobromic acid or polyphosphoric acid (PPA), followed by simultaneous dehydration and debenzotriazolylation furnishes a wide range of polysubstituted naphthalenes 7a-f and of phenanthrenes 9 and 11 in moderate to good yields in one-pot procedures. If compounds 1 are first lithiated